EDN

Using a power transformer at a frequency it wasn’t designed for

Power-transformer designs minimize weight and cost based on three assumptions: (1) the power source is a sine wave, (2) the frequency is fixed, and (3) the voltage will not exceed a specified maximum.
Electronic Design

Estimating Temperature Rise of Transformers

Transformers for power applications often are limited in size by an acceptable temperature rise. An acceptable temperature rise of a transformer is usually dependent on limitations of the materials ...
T&D

Testing Current Transformers with 'the Modeling Concept'

Omicron has introduced a way to test current transformers at all lifecycle stages by using a testing method called "the modeling concept". The "traditional" way of testing a current transformer is to ...
Electronic Design

Targeting Switcher Magnetics Core Loss Calculations

Magnetics product catalogs derive core loss vs. frequency curves by measuring the core losses that result from sinusoidal excitation at varying frequencies and voltage amplitudes. The “B” in the ...